Semiautomatic welding - quickly and efficiently

Welding is an unparalleled process that allows the most reliable and high quality to perform an in-line connection of parts or parts of products from various metals. To date, many different methods and technologies for melting by melting have been developed and introduced into production. Each of the methods has a number of advantages and disadvantages.

One of the most demanded welding technologies is semi-automatic welding in various gas protective environments. It can be performed by specialists, even with a qualification lower than that required for manual arc welding. This process takes less time. The resulting weld, with the observance of the technology, is of high quality and does not require subsequent stripping from the slag. Further processing (priming, painting, etc.) of welded products can be made without undue delay. The use of semiautomatic fusion welding makes it possible to connect very thin metal parts (0.1 - 1.5 mm thick), to perform a joint seam along curvilinear joints, to process joints of short length. This is the ideal welding process for small-scale or batch production.

The name "semiautomatic welding" is given by this technology for the features of the wire feed. In fact, this is the same arc welding with a special wire electrode, carried out in a shielding gas environment. The principle on which semiautomatic welding is based is quite simple. The feeder feeds the welding wire to the receiving device and then to the welding zone. To control the wire electrode feed speed, a special control device is used.

Running the button of the working element simultaneously includes the flow of gas and wire to it. Prior to the start of the process, the place of the planned weld is covered with flux from a special bunker. The arc is excited by the sliding movement of the electrode along the surfaces of the welded edges when the supply of the electrode is turned on, or when the feed and the flux are already connected. In the future, it is necessary to knock down the frozen slag from the end of the electrode, if the arc is extinguished and re-ignited. The process is usually performed on alternating current, although it is also possible to use a constant.

Semiautomatic welding is a partially automated process. Moving the holder along the seam is done by the welder manually, by weight or with the emphasis on a special crutch placed on the product. Apply both portable and stationary feeding mechanisms, the choice depends on the specifics of welding operations. The electrodes are selected in accordance with the properties of the metals to be welded and the characteristics of the weld to be obtained. The shielding gas in which semiautomatic welding is carried out is also chosen based on the properties of the welded steels. For low-carbon steel, the protective gas environment creates carbon dioxide (CO ₂ ), and argon can be used. Gas is supplied from the nozzle, displacing air from the weld zone and protecting the seam.

By purchasing welding equipment, many buyers want to be able to produce also aluminum welding. Due to the peculiarities of this metal, semi-automatic welding of aluminum is technologically more complicated than joining of steel products. The difficulties are associated with a significant difference in the melting temperatures of aluminum itself (660 ° C) and a protective film on its surface (2200 ° C). Get a quality seam and a good provar semi-automatic in an argon environment is possible, but here everything will depend on the skills, skill and skill of the welder performing the work.